Appendix
Flow Schematic – Air-Cooled Chillers
* DISCHARGE BYPASS VALVE ON
7.5HP AND 10HP ONLY. WILL OPEN
FLOW DIAGRAM
AIR-COOLED
*DISCHARGE
BYPASS VALVE
FLUID PRESSURE
IN
DRAIN
SENSOR
WATER
WATER LEVEL
SIGHT GLASS
FROM
PROCESS
RESERVOIR TANK
PUMP
TO
PROCESS
RTD TEMPERATURE
SENSOR
BYPASS
VALVE
FLOW
METER
LOW
PRESSURE
SWITCH
15 PSI CO
SUCTION
LINE
30 PSI CI
COMPRESSOR
TXV
THERMOSTATIC
EXPANSION
VALVE
FILTER
DRIER
SIGHT
GLASS
HOT GAS
BYPASS
PRESSURE
RELIEF VALVE
(675 PSI)
"Y"
STRAINER
(WITH RESET
BUTTON)
REFRIGERANT
HIGH
PRESSURE
SWITCH
(630 PSI)
HAS TWO FANS, ONE WILL
REAR
PANEL
CONDENSER FAN(S)
5 & 7.5 HP HAVE ONE
ENGAGE WITH COMPRESSOR RUNNING, THE
PRESSURE CONTROLLED FAN
CUT IN AT 400 CUT OUT AT 300.
THE 10 HP
SECOND IS PRESSURE CONTROLLED
CUT IN AT 400 CUT OUT AT 300.
ON LOW HEAD PRESSURE ~120 PSI.
FAN
CYCLING
SWITCH
TB1-1,3
110-279 46
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